After reading Bobs fishing tips section I started to make some rags. They are cheap to make and I caught two silvers on them. The backer rod is used for buoyancy to help keep the hook off the bottom and it also holds the yarn. The yarn adds color, holds scent, and gets caught up in their teeth. Since I could not find white backer rod I just used gray. What is the purpose of the white backer rod over the gray backer rod? Does it really matter? Any thoughts would be appreciated.